{"id":114513,"date":"2022-02-08T04:28:58","date_gmt":"2022-02-08T03:28:58","guid":{"rendered":"https:\/\/material-properties.org\/phosphore-et-potassium-comparaison-proprietes\/"},"modified":"2022-03-28T07:57:54","modified_gmt":"2022-03-28T06:57:54","slug":"phosphore-et-potassium-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/phosphore-et-potassium-comparaison-proprietes\/","title":{"rendered":"Phosphore et Potassium – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du phosphore et du potassium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Phosphore contre Potassium.<\/em><\/p>\n

\"phosphore<\/p>\n

\n
<\/span>Comparer le phosphore avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Lithium<\/a><\/p>\n

\"Azote<\/a><\/p>\n

\"Calcium<\/a><\/p>\n

\"Potassium<\/a><\/p>\n

\"Magn\u00e9sium<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le potassium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Lithium<\/a><\/p>\n

\"Oxyg\u00e8ne<\/a><\/p>\n

\"Sodium<\/a><\/p>\n

\"Magn\u00e9sium<\/a><\/p>\n

\"Aluminium<\/a><\/p>\n

\"Phosphore<\/a><\/p>\n

\"Soufre<\/a><\/p>\n

\"Calcium<\/a><\/p>\n

\"Fer<\/a><\/p>\n

\"Zinc<\/a><\/p>\n

\"Brome<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

<\/div>\n
\n

Phosphore et Potassium – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Phosphore<\/h3>\n

En tant qu’\u00e9l\u00e9ment, le phosphore existe sous deux formes principales – le phosphore blanc et le phosphore rouge – mais comme il est hautement r\u00e9actif, le phosphore ne se trouve jamais sous forme d’\u00e9l\u00e9ment libre sur Terre.\u00a0\u00c0 0,099 %, le phosphore est le pnictog\u00e8ne le plus abondant dans la cro\u00fbte terrestre.
\n<\/p><\/div>

<\/div><\/div>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Potassium<\/h3>\n

Le potassium a d’abord \u00e9t\u00e9 isol\u00e9 de la potasse, les cendres des plantes, d’o\u00f9 son nom d\u00e9rive.\u00a0Dans le tableau p\u00e9riodique, le potassium fait partie des m\u00e9taux alcalins.\u00a0Tous les m\u00e9taux alcalins ont un seul \u00e9lectron de valence dans la couche \u00e9lectronique externe, qui est facilement \u00e9limin\u00e9 pour cr\u00e9er un ion avec une charge positive – un cation, qui se combine avec des anions pour former des sels.\u00a0Le potassium naturel est compos\u00e9 de trois isotopes, dont 40K est radioactif.\u00a0Des traces de 40K se trouvent dans tout le potassium, et c’est le radio-isotope le plus courant dans le corps humain.<\/p>\n<\/div>

<\/div><\/div>\n<\/div><\/div>\n
<\/div>\n
\n

\"Phosphore<\/p>\n<\/div><\/div>\n

\n

\"Potassium<\/p>\n

<\/p><\/div><\/div>\n

Source : www.luciteria.com<\/p>\n

<\/div>\n
\n

Phosphore et Potassium – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Phosphore<\/a><\/h3>\n

Le phosphore est un nutriment essentiel pour les plantes (le nutriment le plus souvent limitant, apr\u00e8s l’azote), et la majeure partie de toute la production de phosphore se fait dans des acides phosphoriques concentr\u00e9s pour les engrais agricoles, contenant jusqu’\u00e0 70\u00a0% \u00e0 75\u00a0% de P2O5.\u00a0La grande majorit\u00e9 des compos\u00e9s phosphor\u00e9s extraits sont consomm\u00e9s comme engrais.\u00a0Le phosphate est n\u00e9cessaire pour remplacer le phosphore que les plantes retirent du sol, et sa demande annuelle augmente presque deux fois plus vite que la croissance de la population humaine.\u00a0D’autres applications incluent les compos\u00e9s organophosphor\u00e9s dans les d\u00e9tergents, les pesticides et les agents neurotoxiques.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

Potassium<\/a><\/h3>\n

Le potassium (K) est un nutriment essentiel \u00e0 la croissance des plantes.\u00a0Il est class\u00e9 comme macronutriment car les plantes absorbent de grandes quantit\u00e9s de K au cours de leur cycle de vie.\u00a0Les engrais agricoles consomment 95 % de la production chimique mondiale de potassium, et environ 90 % de ce potassium est fourni sous forme de KCl.\u00a0En raison de son haut degr\u00e9 de r\u00e9activit\u00e9, le potassium pur est rarement utilis\u00e9 sous sa forme \u00e9l\u00e9mentaire\/m\u00e9tallique.\u00a0Il est utilis\u00e9 comme puissant agent r\u00e9ducteur en chimie organique.\u00a0Les alliages Potassium\/Sodium sont utilis\u00e9s comme \u00e9changeur de chaleur.\u00a0La chaleur du potassium r\u00e9chauffe l’eau et la rend suffisamment chaude pour bouillir.\u00a0Ensuite, l’eau est transform\u00e9e en vapeur, qui est utilis\u00e9e pour faire fonctionner des appareils qui g\u00e9n\u00e8rent de l’\u00e9lectricit\u00e9.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Phosphore et potassium – Comparaison dans le tableau<\/h2>\n<\/div><\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/td>\nPhosphore<\/b><\/td>\nPotassium<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n1,823 g\/cm3<\/strong><\/td>\n0,856g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Module de Young<\/td>\nN \/ A<\/strong><\/td>\n3,53 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n0,5<\/strong><\/td>\n0,4<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\nN \/ A<\/strong><\/td>\n0,36 MPa<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n44,1\u00b0C<\/strong><\/td>\n63,25\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n280\u00b0C<\/strong><\/td>\n760\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n0,235 W\/mK<\/strong><\/td>\n102,4 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\nN \/ A<\/strong><\/td>\n83 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,77 J\/g\u00b7K<\/span><\/strong><\/td>\n0,75 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n0,657 kJ\/mole<\/strong><\/td>\n2,334 kJ\/mole<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n51,9 kJ\/mole<\/span><\/strong><\/td>\n79,87 kJ\/mole<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du phosphore et du potassium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Phosphore contre Potassium. Source : www.luciteria.com<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"\nPhosphore et Potassium - Comparaison - Propri\u00e9t\u00e9s - Material Properties<\/title>\n<meta name=\"description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du phosphore et du potassium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. Phosphore contre Potassium.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/material-properties.org\/fr\/phosphore-et-potassium-comparaison-proprietes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Phosphore et Potassium - Comparaison - Propri\u00e9t\u00e9s - Material Properties\" \/>\n<meta property=\"og:description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du phosphore et du potassium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. 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